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<pre><span class="sourceLineNo">001</span><a name="line.1"></a>
<span class="sourceLineNo">002</span>/*<a name="line.2"></a>
<span class="sourceLineNo">003</span> * Copyright (C) 2011 Archie L. Cobbs. All rights reserved.<a name="line.3"></a>
<span class="sourceLineNo">004</span> *<a name="line.4"></a>
<span class="sourceLineNo">005</span> * $Id: BeanNameComparator.html 689 2013-06-28 19:22:16Z archie.cobbs $<a name="line.5"></a>
<span class="sourceLineNo">006</span> */<a name="line.6"></a>
<span class="sourceLineNo">007</span><a name="line.7"></a>
<span class="sourceLineNo">008</span>package org.dellroad.stuff.spring;<a name="line.8"></a>
<span class="sourceLineNo">009</span><a name="line.9"></a>
<span class="sourceLineNo">010</span>import java.util.Comparator;<a name="line.10"></a>
<span class="sourceLineNo">011</span>import java.util.HashMap;<a name="line.11"></a>
<span class="sourceLineNo">012</span><a name="line.12"></a>
<span class="sourceLineNo">013</span>import org.springframework.beans.factory.ListableBeanFactory;<a name="line.13"></a>
<span class="sourceLineNo">014</span><a name="line.14"></a>
<span class="sourceLineNo">015</span>/**<a name="line.15"></a>
<span class="sourceLineNo">016</span> * A {@link Comparator} that orders Spring bean names in the same order as the corresponding<a name="line.16"></a>
<span class="sourceLineNo">017</span> * beans appear in a {@link ListableBeanFactory}.<a name="line.17"></a>
<span class="sourceLineNo">018</span> *<a name="line.18"></a>
<span class="sourceLineNo">019</span> * &lt;p&gt;<a name="line.19"></a>
<span class="sourceLineNo">020</span> * Names that are not present in the configured {@link ListableBeanFactory} cause an exception.<a name="line.20"></a>
<span class="sourceLineNo">021</span> */<a name="line.21"></a>
<span class="sourceLineNo">022</span>public class BeanNameComparator implements Comparator&lt;String&gt; {<a name="line.22"></a>
<span class="sourceLineNo">023</span><a name="line.23"></a>
<span class="sourceLineNo">024</span>    private final HashMap&lt;String, Integer&gt; beanNameMap;<a name="line.24"></a>
<span class="sourceLineNo">025</span>    private final String factoryName;<a name="line.25"></a>
<span class="sourceLineNo">026</span><a name="line.26"></a>
<span class="sourceLineNo">027</span>    public BeanNameComparator(ListableBeanFactory beanFactory) {<a name="line.27"></a>
<span class="sourceLineNo">028</span>        String[] beanNames = beanFactory.getBeanDefinitionNames();<a name="line.28"></a>
<span class="sourceLineNo">029</span>        this.beanNameMap = new HashMap&lt;String, Integer&gt;(beanNames.length);<a name="line.29"></a>
<span class="sourceLineNo">030</span>        for (int i = 0; i &lt; beanNames.length; i++)<a name="line.30"></a>
<span class="sourceLineNo">031</span>            this.beanNameMap.put(beanNames[i], i);<a name="line.31"></a>
<span class="sourceLineNo">032</span>        this.factoryName = "" + beanFactory;<a name="line.32"></a>
<span class="sourceLineNo">033</span>    }<a name="line.33"></a>
<span class="sourceLineNo">034</span><a name="line.34"></a>
<span class="sourceLineNo">035</span>    @Override<a name="line.35"></a>
<span class="sourceLineNo">036</span>    public int compare(String name1, String name2) {<a name="line.36"></a>
<span class="sourceLineNo">037</span>        Integer index1 = this.beanNameMap.get(name1);<a name="line.37"></a>
<span class="sourceLineNo">038</span>        Integer index2 = this.beanNameMap.get(name2);<a name="line.38"></a>
<span class="sourceLineNo">039</span>        if (index1 == null)<a name="line.39"></a>
<span class="sourceLineNo">040</span>            throw new IllegalArgumentException("failed to find bean `" + name1 + "' in bean factory " + this.factoryName);<a name="line.40"></a>
<span class="sourceLineNo">041</span>        if (index2 == null)<a name="line.41"></a>
<span class="sourceLineNo">042</span>            throw new IllegalArgumentException("failed to find bean `" + name2 + "' in bean factory " + this.factoryName);<a name="line.42"></a>
<span class="sourceLineNo">043</span>        return index1 - index2;<a name="line.43"></a>
<span class="sourceLineNo">044</span>    }<a name="line.44"></a>
<span class="sourceLineNo">045</span>}<a name="line.45"></a>
<span class="sourceLineNo">046</span><a name="line.46"></a>




























































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